fix: let hot reloading work in Voila

share/jupyter/nbconvert/templates/jdaviz-default/app.html

@@ -1,6 +1,6 @@
 {% raw -%}
 <div id="web-app" style="display: none">
-    <v-app >
+    <v-app :key="forceUpdateTrigger">
         <v-slide-y-transition>
             <v-layout v-show="loading" align-center justify-center>
                 <v-card style="min-width: 600px">
@@ -65,12 +65,20 @@ <h1>{{ loading_text }}</h1>
         },
     }),
     el: '#web-app',
+    created() {
+        const original_$forceUpdate = this.$forceUpdate.bind(this);
+        this.$forceUpdate = (() => {
+            this.forceUpdateTrigger += 1;
+            original_$forceUpdate();
+        });
+    },
     mounted() {
         document.querySelector('#web-app').removeAttribute("style");
         this.$vuetify.theme.dark = !!document.querySelector('body.theme-dark');
     },
     data() {
         return {
+            forceUpdateTrigger: 0,
             loading_text: "Loading page",
             loadingPercentage: -1,
             loading: true,